How severe is CVE-2026-32203?

CVE-2026-32203 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-32203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32203?

CVE-2026-32203 primarily affects Microsoft .net. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-32203?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-32203 have an EU (EUVD) identifier?

Yes. CVE-2026-32203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22591.

When was CVE-2026-32203 published?

CVE-2026-32203 was published on 2026-04-14 and last updated on 2026-06-30.

CVE-2026-32203

CVE-2026-32203 is a high-severity vulnerability in Microsoft .net with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22591
Weakness: CWE-20
Affected product: Microsoft .net
Published: 2026-04-14
Last modified: 2026-06-30

Description

Stack-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to deny service over a network.

Frequently asked questions

What is CVE-2026-32203?: Stack-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to deny service over a network.
How severe is CVE-2026-32203?: CVE-2026-32203 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-32203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32203?: CVE-2026-32203 primarily affects Microsoft .net. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-32203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-32203 have an EU (EUVD) identifier?: Yes. CVE-2026-32203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22591.
When was CVE-2026-32203 published?: CVE-2026-32203 was published on 2026-04-14 and last updated on 2026-06-30.

References

Affected products (4)

cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:-:*:*
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*

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